Investigation of Microstructures, Mechanical Properties of AZ91E Hybrid Composite Reinforced with Silicon Carbide and Fl
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ORIGINAL PAPER
Investigation of Microstructures, Mechanical Properties of AZ91E Hybrid Composite Reinforced with Silicon Carbide and Fly Ash Ravi Kumar Saranu 1 & Ratnam Chanamala 2 & Srinivasa Rao Putti 2 & Gopi Krishna Mallarapu 3 Received: 23 March 2020 / Accepted: 26 August 2020 # Springer Nature B.V. 2020
Abstract In this study, the stir casting processing technique was used to produce the AZ91E hybrid composite reinforced with Silicon Carbide (SiC) and Fly ash (FA) particles in different weight percentages varying from 0 to 10%.30 μm in size. This paper investigates the micro structural phenomena and partial mechanical behavior (i.e., tensile strength, hardness, and fracture toughness) of AZ91E alloy reinforced with SiC and FA. Scanning Electron Microscope (SEM) furnished with Energy Dispersive X-ray spectroscopy (EDX) was used to investigate the microstructures. The results show that the SiC and Fly-ash particles are uniformly distributed in the matrix, and there is no sign of SiC and Fly ash agglomerations. The densities of the composites varied from1.805–1.829 g/cm3.The results of hybrid composite samples are then compared with as AZ91E alloy samples. This study found that the addition of both a hard reinforcement (e.g., SiC) and soft reinforcement (e.g., fly ash) remarkably improves the mechanical property such as tensile strength, the hardness of magnesium composites. However, the fracture toughness and elongation of magnesium composites were decreased due to grain refinement due to the addition of reinforcement particles. The tensile test results obtained from the experimental process were compared with finite element method results. The finite element results were in good agreement with the experimental results. Keywords AZ91E magnesium . Fly ash (FA) . Tensilestrength . Fracture toughness . Hardness . Microstructure . MMCs . Silicon carbide (SiC) . Finite element method
1 Introduction In the present world, the invention of new materials is significant because of low weight applications. * Ravi Kumar Saranu [email protected] Ratnam Chanamala [email protected] Srinivasa Rao Putti [email protected] Gopi Krishna Mallarapu [email protected] 1
Department of Mechanical Engineering, Bapatla Engineering College, Bapatla, Andhra Pradesh 522102, India
2
Department of Mechanical Engineering, Andhra University, Waltair Junction, Visakhapatnam, Andhra Pradesh 530003, India
3
Department of Mechanical Engineering, Acharya Nagarjuna University, Guntur, Andhra Pradesh 522002, India
In the last decade, the use of aluminum alloys is more for weight reduction applications. However, in recent years, the use of magnesium alloys has rapidly increased due to low density of magnesium compared to aluminum and steel. Metal Matrix Composites (MMCs) having Magnesium alloys as base material are selected for automotive, aircraft, and electronic industrial applications due to its low density (approximately1.8 g/cm3for magnesium alloys), high mechanical and thermal properties were attained [1–7]. Manufacturing as
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